Start of removal of model tag vars

* Removed tag/root tag vars from models except where still needed
  for auto serialization

Change-Id: I261bfd4bfa9cd6e9c0b8fb3eba3a3ef39f2aab00
Updated reference config

* Updated devstack and reference configs to match latest config params

Change-Id: I5ada3e7541c398156a69565499319c762c6ab4c1
Merge "Updated reference config"
Merge "Start of removal of model tag vars"
Merge branch 'master' of https://github.com/stackforge/cloudcafe into glance
Merge branch 'glance' of http://github.com/sw00/cloudcafe into glance